Soluble metalworking oil



United States Patent 2,695,272 SOLUBLE METALWORKING on Laurence F. King and Lorne W. 'Sproule, Sarnia, Ontario, Canada, assignors to Standard Oil Development Commay, a corporation of Delaware No Drawing. Application May 21,

Serial N0. 289,196

6 Claims. (Cl. 25233.2)

gredients wh pensive than factory products.

11 e prior art the advantages of the or emulsifiable cutting oils have Since these combined being operated upon. sidered it essential to use certain types of emulsifying inthe oil composition. Hence, it is essential that the emulsifying agents be highly etfectlve.

short supply. as to 15% by weight of these sulfonates with other ingredientswhich or even superior results. ccording to the for machining metals.

of sodium petroleum sulthe reaction products of 1.25% triethanolamine, a similar quantity of naphthenic :cid, and 4.5% of refined tall oil gave results that were y as good and the comiercial product.

relatively low viscosity mdex may used very satisfactorily. Synthetic oils may be used or in lieu of mineral oil.

A product ndelilla wax) tion requires none. It is just as 5 Inspections:

Patented Nov. 23, 1954 2 product in its perience has been shown that it can be used satisfactorily in -a variety of product gives satisfactory surface finish of the both against rust.

results wit regard to tool life, machined product and protection of composition of oil soluble of an alkylolamine salt of naphthenic acid and 3 to 8% of an 'alkylolamine salt or soap) of tall oil. More specifically a preferred comand 15 p of the sulfonate,

ne s'a t os1t1on contains between 4 to 4% of triethanolaini vlscosity sidered feasi to By red stantially and substituting above a mor e viscous oil at the outset, and one having a lower viscosity index, gives no higher resulting viscosity.

Table Formula, Percent by Wt. i ggggg g Sodium Sulphonate (dry basis) Sodium N aphthenate Tr ethanolamine Naphthena thanolamine Tallate ater Alcohol Mineral Oil (V/10 0; V. I.

Mineral Oil (V/=130; V. I.

Candelilla Wax Visc. 100 F. S. S. U Free Acid, percent Emulsion Characterist s (10:1 Emulsion):

) Distilled Water After 1 1112, cc. separated After 24 hrs, cc. separated (0) Hard Water Afterl hr., cc. separated 1 (cream) 0.5 (cream). 3 (cream).

1 (cream).

0.5 ll 1 (oil).

After 24 hrs, cc. separated. Foaming, Increase in Vol. cc Ggg lnlgfendencies (after 7 days at pass contains 1,000 p. p. m. of both magnesium chloride and calcium chloride.

2 500 cc. of 10:1 emulsion stirred at 500 r. p. m. in Mixmaster pan for15 minutes.

0 It will be understood that other conventional modifiers may be add ed to the product of this invention as will be obvious to those skilled in the art. Thus, other conventional soaps, antioxidants, anti-foamants, load bearing agents (extreme pressure or oiliness additives) and the like may be included.

What is claimed is:

1. A soluble metal working lubricant composition comprising a mineral base lubricating oil, 2 to 7% by weight, based on the total composition, of oil soluble sodium sulphonate, and supplementary soaps including 1 to 5% of an alkylolamine salt of naphthenic acid an 3 to 8% of an alkylol amine soap of tall oil.

2. A soluble cutting oil composition comprising a mineral base lubricating oil, about 4 to 5% by weight, based on the total composition of oil soluble sodium sulphonate, and supplementary amine soaps comprising 2 to 4% of triethanolamine naphthenate and 5 to 7% of the triethanolamine soap of refined tall oil.

3. Composition according to claim 2 wherein the mineral oil has a viscosity index below 60.

4. Composition according to claim 2 to which is added 0.5 to 1% of alcohol as a coupling agent.

5. An emulsifiable cutting oil composition having approximately the following formula:

Percent by weight Mineral oil of 130 S. S. U. viscosity at 100 F. and

35 viscosity index 84.5 Oil soluble sodium petroleum sulfonate-dry basis 4. Triethanolamine soap of refined tall oil Triethanolamine naphthenate Water Ethyl alcohol 6. A comp by weight of dex, 4 to 5% of triethanolamine naphthenate,

olamine soap of refined tall oil, and 0.5 to 1% alcohol and water.

osition consisting essentially of 80 to 88% mineral lubricating oil of low viscosity inof oil soluble sodium petroleum sulphonate,

5 to 7% of References Cited in the file of this patent Number UNITED STATES PATENTS 

1. A SOLUBLE METAL WORKING LUBRICANT COMPOSITION COMPRISING A MINERAL BASE LUBRICATING OIL, 2 TO 7% BY WEIGHT, BASED ON THE TOTAL COMPOSITION, OF OIL SOLUBLE SODIUM SULPHONATE, AND SUPPLEMENTARY SOAPS INCLUDING 1 TO 5% OF AN ALKYLOLAMINE SALT OF NAPHTHENIC ACID AND 3 TO 8% OF AN ALKYLOL AMINE SOAP OF TALL OIL. 